Find the Slope of the Graph

Which function families have maximums and minimums? 1.)linear absolute value functions and exponential functions 2.) linear absolute value functions and quadratic functions 3.) linear absolute value functions and linear functions 4.) linear absolute value functions and constant functions

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Does anyone know how to do geometryme with this problem